[Graphics] Graphics Glitch with Sprites inserted using Advanced Series Sprite Editor (free space issue?)

[fuchsiacityfighter]

So I`ve been attempting to teach myself rom hacking, and I`ve run into a problem I can`t figure out how to fix. I`ve been able to successfully replace sprites using Wichu`s Advanced Series Sprite Editor, and while the sprites are there when I load up the game, they`re glitched. I heard somewhere that his type of issue could be related to lack of free space, but I`ve used the "Find Free Space" tool/option every time I`ve written the changes to the rom. The same thing happens when I edit the color palette of an existing sprite; any edit I make to a sprite results in this.

Image 1: How it looks in game

Image 2: The sprite editing window

Image 3: How the sprites looked in-program before I booted up the rom

Image 4: The write to rom window

Image 5: How the sprites looked in-program after I booted up the rom

I`ve been trying to troubleshoot this for the past couple days with no result. Hopefully it`s just a minor thing I don`t know how to fix because I`m a noob.